side bar slides down (5 posts)

I'm using a two column design for my blog. Started out with Kubrick and now using Thesis. My right side bar is properly located at the top of the page on my home computer but on other computers (not all) it has slid all the way to the bottom. It seems to be inconsistent as to why it's positioned properly on some computers and not others. Please help. I want to start promoting the site but I need to be sure it's positioned correctly.

Looks fine to me... But the most likely cause when something like this happens is that the sidebar ended up too wide. Likely because of an item that's too large, such as a very long word or link or an image (that image at the top in this case seems the most likely culprit), that causes the browser to try to widen it to make said item fit, which makes everything end up wider than the screen (take margins into account too), so the wrapping throws the sidebar below the content portion.
One simple solution would be to leave some room for such events, not making the different page areas add up to 100% (or to the maximum width if you're using exact numbers). On mine the content part has a width of 75% and the sidebar has 20%, because 80/20 tended to cause such things.

Thanks for getting back to me Cavalary. I'll give it a try. According to the Thesis column layout the left column is 540 pixels and the right column is 260 pixels. I've just resized the image at the top of the right hand column to 250 pixels (I hope). I'll see tomorrow if this works.